add memory region object for better memory managment

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/bitmap.h b/lib/bitmap.h
new file mode 100644
index 0000000..db9653a
--- /dev/null
+++ b/lib/bitmap.h
@@ -0,0 +1,25 @@
+#ifndef _JOVE_LIB_BITMAP_H
+#define _JOVE_LIB_BITMAP_H 1
+
+#include <stddef.h>
+#include <stdbool.h>
+
+typedef unsigned char bitmap_block_t;
+#define BITMAP_BLOCK_BITS (sizeof(bitmap_block_t) * 8)
+
+struct bitmap
+{
+    unsigned int total_bits;
+    unsigned int free_bits;
+    unsigned int last_free_bit;
+    bitmap_block_t data[];
+};
+
+extern bool bitmap_check(struct bitmap *bitmap, size_t idx);
+extern void bitmap_set(struct bitmap *bitmap, size_t idx);
+extern void bitmap_unset(struct bitmap *bitmap, size_t idx);
+
+int bitmap_findfree(struct bitmap *bitmap);
+int bitmap_findfree_contig(struct bitmap *bitmap, size_t size);
+
+#endif